have a 6850 from 1 week and run on 94% fan speed and in the games the temperature goes around 90c. is that too high and riscy for the card ?
Sometimes i have fragments on youtube videos,some strange pixels,is it possible the card to be damage ? TNX

Just in case, make sure you have drivers installed of a version you know sure about that worked for you. Disabling hardware acceleration in your webbrowser can be practical too (assuming it happens only when watching streamed videos).

Edit: although that would not explain the high temps you get... sorry for that.